Headset



FIG. 1 is a perspective view of a headset showing my new design;

FIG. 2 is a plan view;

FIG. 3 is one end view;

FIG. 4 is the other end view;

FIG. 5 is a side elevational view; and

FIG. 6 is a bottom plan view. 

The ornamental design for a headset, substantially as shown. 